| 引用本文: | 杨亮彦,石磊,孔辉.2000—2019年毛乌素沙地地表温度演变规律及影响因素分析[J].灌溉排水学报,0,():-. |
| Yang Liangyan,Shi Lei,Kong Hui.2000—2019年毛乌素沙地地表温度演变规律及影响因素分析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】明晰全球气候变化和退耕还林还草工程实施背景下毛乌素沙地地表温度的演变规律及其影响因素。【方法】基于地理空间数据云提供的2000—2015年MOSLT1M中国1km地表温度和在NASA下载的2016—2019年MODIS/TERRA卫星的MOD11A2地表温度，利用线性回归斜率法对2000—2019年毛乌素沙地地表温度时空特征进行分析，并探究了地表温度与气候、土地利用类型和植被指数的相关性。【结果】毛乌素沙地地表温度在空间分布上存在明显差异性，呈从西北到东南逐渐降低、西部高于东部的总体变化趋势，在时间序列上，总体呈下降趋势，下降速率为0.59 ℃/(10a)；毛乌素沙地年均地表温度与气温波动趋势较为一致，二者在2000—2005、2005—2009、2009—2013年时间段间均出现先降低后升高的规律，并在2003、2012年同为极小值点；地表温度受土地利用类型变化影响较大，不同土地利用类型的地表温度差异性明显，建设用地和未利用地地表温度最高，其次是草地和林地，最后是耕地和水域；地表温度与NDVI的变化趋势负相关，决定系数为0.513 1；毛乌素沙地地表温度的时空变化趋势与全球气候变化逐渐变暖的趋势不同，其主要原因是人类活动改变了土地利用类型，增加了当地的植被覆盖度。【结论】毛乌素沙地地表温度时空变化是人类活动和气候变化共同影响的结果，且在2000—2019年人类活动是主导因素。 |
| 关键词: 毛乌素沙地；地表温度；气候变化；人类活动 |
| DOI： |
| 分类号:P42 |
| 基金项目:陕西省土地工程建设集团内部项目(DJNY2021-33)；陕西省技术创新引导专项基金(2021CGBX-03) |
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| Analysis of the Evolution Law and Influencing Factors of the Land Surface Temperature in Mu Us Sandy Land from 2000 to 2019 |
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Yang Liangyan, Shi Lei, Kong Hui
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Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd.
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| Abstract: |
| 【Objective】In order to clarify the evolution pattern of surface temperature and its influencing factors in Mu Us Sandy Land under the background of global climate change and the implementation of the project of returning farmland to forest and grass. 【Methods】 Based on the monthly synthetic products of MOSLT1M China 1km surface temperature from 2000—2015 provided by Geospatial Data Cloud and the surface temperature of MOD11A2 from MODIS/TERRA satellite downloaded at NASA from 2016—2019, we used linear regression slope method was used to analyze the spatial and temporal characteristics of surface temperature in the Mu Us Sandy Land from 2000—2019, and to explore the correlation between surface temperature and climate, land use type and vegetation index. 【Results】 The spatial distribution of surface temperature in the Mu Us Sandy Land showed significant variability, with a general trend of gradually decreasing from northwest to southeast and higher in the west than in the east, and an overall decreasing trend in the time series, with a decline rate of 0.59 ℃/(10a); the annual average surface temperature and temperature fluctuation trends in the Mu Us Sandy Land were relatively consistent, and the two fluctuated in the time periods of 2000—2005, 2005—2009 and 2009—2013. The surface temperature is influenced by the change of land use types, and the difference of surface temperature of different land use types is obvious, the surface temperature of construction land and unused land is the highest, followed by grassland and forest land, and finally cultivated land and water; the trend of surface temperature and The trend of NDVI showed a negative correlation with a coefficient of determination of 0.513 1; the spatial and temporal trends of surface temperature in the Mu Us Sandy Land were different from the gradual warming trend of global climate change, and the main reason was that human activities changed the land use types and increased the local vegetation cover. 【Conclusion】 The spatial and temporal variation of surface temperature in the Mu Us Sandy Land is the result of the joint influence of human activities and climate change, and human activities is the dominant factor in the period 2000-2019. |
| Key words: Mu Us Sandy Land; land surface temperature; climate change; human activities |
